package map;

import java.util.*;

public class MapDemo2 {
    public static void main(String[] args) {
        Map<String,Integer> map = new HashMap<>();
        map.put("语文",99);
        map.put("数学",98);
        map.put("英语",97);
        map.put("物理",96);
        map.put("化学",99);
        System.out.println(map);

        Set<String> keySet = map.keySet();
        for (String key : keySet){
            System.out.println("key:"+key);
        }

        Set<Map.Entry<String,Integer>> entrySet =  map.entrySet();
        for (Map.Entry<String,Integer> e : entrySet){
            String key = e.getKey();
            Integer value = e.getValue();
            System.out.println(key+":"+value);
        }
        System.out.println("--------------");
        Collection<Integer> values = map.values();
        for (Integer value : values){
            System.out.println("value"+value);
        }

        values.forEach(e-> System.out.println(e));
        values.forEach(System.out::println);

        map.forEach((v,k)->{
            System.out.println(k+":"+v);
        });
    }
}
